N → a less common name for stone's throw
He is merely throwing the idea forward for discussion, it is not cast in stone.
他只是抛出个想法供讨论，不是固定不变的。
Although Ben saw the girl cheating he did not want to cast the first stone.
本虽然看见那女孩作弊，但不愿带头揭发她。
Some of the incorrect English has already been engraved in stone or cast in bronze, making revision costly.
有些地方的不正确英语已经刻在了石头上或是铸到了青铜上，重来就要花费很多钱。
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